PROBLEM TO BE SOLVED: To provide a spectral data processing device capable of shortening the time required to analyze principal components of spectral data. ! SOLUTION: A spectral data processing device 6 for processing the spectral data acquired for each of a plurality of regions in a sample comprises an analysis unit 13 which analyzes principal components of spectral data. The analysis unit acquires an eigenvector by analyzing principal components of first spectral data in a first region of the plurality of regions, and analyzes principal components of second spectral data in a second region different from the first region of the plurality of regions using the acquired eigenvector. ! COPYRIGHT: (C)2015,JPO&INPIT